JP2964524B2 - Wiper device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiper device for a vehicle having a built-in one-touch operation switch for operating a wiper motor only when the switch is turned on as required.

2. Description of the Related Art A conventional technique will be described with reference to FIGS.

FIG. 7 is a front view of a combination switch provided with a wiper device having a built-in one-touch operation switch, FIG. 8 is a side view thereof, FIG. 9 is a partially enlarged sectional view of the same, and FIG. FIG. 11 is an explanatory diagram illustrating the configuration of a wiper device incorporating an operation switch, FIG. 11 is an explanatory diagram illustrating an operation when the one-touch operation switch is operated, and FIG. 12 is a diagram illustrating the operation after operating the one-touch operation switch. FIG. 4 is an explanatory diagram for describing a state until a wiper motor enters an automatic stop state.

According to the figure, 1 is a combination switch body,
2 is a wiper knob, 3 is a wiper lever, 4 is a wiper motor having a motor changeover switch 5, 6 is a battery, and the wiper motor 4 and the battery 6 are mounted on the vehicle side other than the combination switch 1. Reference numeral 7 denotes a movable terminal having a contact 8, reference numeral 9 denotes a contact connected to one end of the battery, and reference numeral 10 denotes a contact, which is connected to a common contact of the wiper motor changeover switch 5. 11
Is an actuator for transmitting the operation of the wiper lever 3 to the movable terminal 7 for one-touch operation, 12 is a terminal plate (or printed board) for fixing the contact 9 and the movable terminal 7, and 13 is a terminal plate (or These are rivets for fixing to the printed circuit board (12).

Next, the operation of the above conventional technique will be described.
As shown in the figure, when the wiper knob 2 is operated to the front,
The lever 3 moves downward as shown in FIG.
Is pushed down, and the contact 8 added to the movable terminal 7 is connected to the contact 9.

When the contacts 8 and 9 are connected in this way, an ignition switch (hereinafter referred to as IGSW) 6a,
A current flows through the wiper motor 4 through the contact 9, the contact 8, and the movable terminal 7, and the wiper motor 4 starts rotating, and the wiper motor 4 keeps rotating while the one-touch operation switch is operated. When this operation is stopped, as shown in FIG. 9, the wiper knob 2
The ball 16 and the spring 17 automatically return to the original knob position, and the lever 3 also returns to the original position. At this time, the twelfth
As shown in FIG.
The contact between the contact 9 and the contact 8 is released, and the energization of the motor 4 is temporarily interrupted. However, the contact 8 is connected to the contact 10 by the self-returning force of the movable terminal 7 and the wiper motor 4 Is not in the automatic stop position, the common terminal of the motor switch 5 is connected to the positive terminal side of the battery, so that the wiper motor 4 has the battery 6, IGSW 6a, motor switch 5, contact 10, contact 8, movable terminal The current flows through the wiper motor 4 through 7, and the wiper motor 4 keeps rotating.

When the motor comes to the automatic stop position, the common contact of the motor switch 5 is switched to the minus side, so that the power supply to the wiper motor 4 is cut off, and the wiper motor 4 stops as shown in FIG.

Reference numeral 50 denotes an intermittent wiper control circuit for intermittently operating the wiper motor 4 and includes a resistor 51, a capacitor 52, a relay 54, and the like, but the description of the operation is omitted.

However, in the above-described conventional wiper device, the wiper motor 4 is driven by directly operating the one-touch operation switch.
Therefore, there is a problem that the capacity of the one-touch operation switch must be increased and a contact 10 for automatically stopping the wiper motor 4 is required.

Means for Solving the Problems In order to solve the above problems, the present invention uses an intermittent wiper control circuit to perform a one-touch operation.

Operation Since the present invention performs a one-touch operation using an intermittent wiper control circuit, the capacity of the one-touch operation switch can be reduced and the wiper device can be simplified.

Embodiment An embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a partial sectional side view of a combination switch provided with a wiper device having a built-in one-touch operation function excluding a wiper motor and a battery of the present invention, and FIG. 2 shows a state where the one-touch operation switch is operated. FIG. 3 is a partial side cross-sectional view, FIG. 3 is an explanatory diagram illustrating a configuration of a wiper device incorporating the one-touch operation switch, and FIG. 4 is an explanatory diagram illustrating an operation when the one-touch operation switch is operated. FIG. 5 is an explanatory view illustrating a state until the wiper is automatically stopped, and FIG. 6 is an explanatory view illustrating a configuration of a wiper device having a built-in one-touch operation switch according to another embodiment of the present invention. FIG.
According to FIGS. 1 to 5, reference numeral 23 denotes an intermittent wiper control circuit, reference numeral 24 denotes a wiper motor drive circuit in the intermittent wiper control circuit 23, reference numeral 25 denotes a terminal board (or printed circuit board), reference numeral 26
Is a movable terminal, 27 is an actuator, 28 is a contact, 29
Are the common contact 29a and the switching contact 29 in the intermittent wiper control circuit 23.
A relay having b and 29c, 30 is a wiper motor, and 31 is an auto stop switch in the wiper motor. Reference numeral 32 denotes an operation lever, reference numeral 33 denotes a rivet for fixing the movable terminal 26 to the terminal plate (or printed circuit board) 25, reference numeral 34 denotes a battery, and operation lever 32 is provided on a sliding body 37 by a spring 35 and a ball 36. It is fixed, and the slide body 37 is
It is held by the main body 38. Reference numeral 40 denotes an intermittent wiper switch.

The one-touch operation switch is connected to actuator 2
7, while the contact 28, the movable terminal 26, etc.
The battery 34 and the wiper motor drive circuit 24 are connected between the resistor 24b for setting the intermittent time and the capacitor 24c.
b, short-circuiting is not performed via the intermittent wiper switch 40.

Next, the operation of the above embodiment will be described. When the operation lever 32 is operated to the front and the one-touch operation switch is operated in a direction for turning on, the tip of the operation lever 32 is moved to the second point around the point A in FIG. As shown in the figure, the actuator 27 is pushed down, and the movable terminal 26 comes into contact with the contact 28. When this contacts, the battery 34 contacts the contact 28, the movable terminal 26, and the wiper motor drive circuit.
A current flows into the base of the transistor 24a, the transistor 24a is turned on, the relay 29 is energized, the common contact 29a of the relay is connected to the relay contact 29b, and the relay contacts 29b, 29a and the wiper motor are connected from the battery 34. Electric current flows through 30, the wiper motor 30 is energized, and the wiper motor 30 starts rotating as shown in FIG. While the operation of the one-touch operation switch is continued (while the actuator 27 is being pressed down), the relay 29 is kept on and the wiper motor 30 is kept rotating. When the operation of the one-touch operation switch is turned off, the operation lever 32 auto-returns by the chevron 37a provided on the slide 37, the spring 35, and the ball 36, returns to the original lever position, and returns to the original position of the movable terminal 26. The actuator rises on the actuator 27 by the return force, and the contact 28 and the movable terminal
The connection of 26 is released, and the power to the wiper motor drive circuit 24 is stopped, the transistor 24a is turned off, and the relay 29 is also turned off. When the relay 29 turns off, the relay common contact 29a
And 29b were conducting, but this time the common contact 29a and the contact 29
When the wiper motor 30 is not at the automatic stop position, the common terminal 31a of the wiper motor switch 31 is connected to the positive terminal 31c of the battery as shown in FIG. Therefore, the wiper motor 30
Battery 34, contact 31c to contact 31a of motor switch 31
Current flows from the contact 29c of the relay 29 to the common contact 29a and the wiper motor 30, and the wiper motor 30 keeps rotating.

When the wiper motor 30 comes to the automatic stop position, the common contact 31a of the motor switch 31 is connected to the minus contact 31b as shown in FIG. 3, the power to the wiper motor 30 is cut off, and the wiper motor 30 stops. Will be.

As described above, in the above embodiment, the one-touch operation switch is provided so that voltage can be supplied to the wiper motor drive circuit without passing through the resistor 24b of the series circuit of the resistor 24b and the capacitor 24c for setting the drive interval of the wiper. Therefore, the wiper drive can be performed with the wiper drive interval set to 0.

FIG. 6 shows another embodiment. To explain the structure and operation, when an operation for one-touch operation is performed by the operation lever 32, the actuator 27 is pushed down, and the movable terminal 26 Connected to When this contacts, one end of the relay coil 29d is connected to the ground, so that current flows through the battery 34, the relay coil 29d, the movable terminal 26, the contact 28, and the ground, and the relay 29 is turned on, and the common contact 29a of the relay 29 is turned on. However, a current flows through the wiper motor 30 connected to the battery plus side terminal 29b, and the wiper motor 30 starts rotating.

As described above, in the above embodiment, the wiper motor drive circuit
24, an intermittent wiper control circuit 23 including a relay 29 driven by the wiper motor drive circuit 24, and a one-touch operation switch provided in parallel with the wiper motor drive circuit 24, so that the relay 29 is directly driven by the one-touch operation switch. Then, the wiper motor 30 is driven.

The operation in the case where the operation of the one-touch operation switch is turned off is the same as in the above-described embodiment, and a description thereof will be omitted. Further, the wiper device according to the present invention is described as a combination switch having a built-in switch excluding the wiper motor 30 and the battery 34. However, all or a part of other parts may be provided on the vehicle body side. .

Advantageous Effects of the Invention The wiper device for an automobile according to the present invention has a one-touch operation switch because the relay of the intermittent wiper control circuit or the wiper motor drive circuit for driving the relay is directly connected to the current via the one-touch operation switch. When operating the switch, the wiper device operates regardless of the series circuit of the resistor and the capacitor, and the contact connected to the wiper motor changeover switch can be omitted, simplifying the structure of the one-touch operation switch and achieving one-touch operation. Since the control current flowing through the switch is a very small current, the cost of the contact portion of the one-touch operation switch can be reduced.

[Brief description of the drawings]

FIG. 1 is a partial sectional side view of a combination switch having a wiper device having a built-in one-touch operation function according to an embodiment of the present invention, and FIG. 2 shows a state where the one-touch operation switch of the wiper device is operated. FIG. 3 is a partial side cross-sectional view, FIG. 3 is an explanatory diagram illustrating a configuration of a wiper device incorporating the one-touch operation switch, and FIG. 4 is an explanatory diagram illustrating an operation when the one-touch operation switch is operated. FIG. 5 is an explanatory view for explaining a state until the wiper automatically stops, FIG. 6 is an explanatory view for explaining a configuration of a wiper device according to another embodiment of the present invention, and FIG. Is a front view of a combination switch provided with a wiper device incorporating a conventional one-touch operation switch, FIG. 8 is a side view thereof, FIG. 9 is an enlarged partial sectional view of the same, FIG. 10 is a diagram illustrating the configuration of a wiper device incorporating the same one-touch operation switch,
FIG. 11 is an explanatory diagram for explaining an operation when the one-touch operation switch is operated, and FIG. 12 is an explanatory diagram for explaining a state after the one-touch operation switch is operated until the wiper motor is automatically stopped. 23 ... intermittent wiper control circuit, 24 ... wiper motor drive circuit, 24 b ... resistor, 24 c ... capacitor, 26 ... movable terminal, 27 ... actuator, 28 ... contact, 29 ... relay.

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B60S 1/00-1/68

Claims (1)

(57) [Claims] The present invention comprises a series circuit of a resistor and a capacitor for setting an intermittent time of a wiper, a relay for driving a wiper motor, and a wiper motor drive circuit for driving the relay. A wiper device either of which is directly connected to a power source via a one-touch operation switch.